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							- 'use strict';
 
- const mergePromiseProperty = (spawned, promise, property) => {
 
- 	// Starting the main `promise` is deferred to avoid consuming streams
 
- 	const value = typeof promise === 'function' ?
 
- 		(...args) => promise()[property](...args) :
 
- 		promise[property].bind(promise);
 
- 	Object.defineProperty(spawned, property, {
 
- 		value,
 
- 		writable: true,
 
- 		enumerable: false,
 
- 		configurable: true
 
- 	});
 
- };
 
- // The return value is a mixin of `childProcess` and `Promise`
 
- const mergePromise = (spawned, promise) => {
 
- 	mergePromiseProperty(spawned, promise, 'then');
 
- 	mergePromiseProperty(spawned, promise, 'catch');
 
- 	// TODO: Remove the `if`-guard when targeting Node.js 10
 
- 	if (Promise.prototype.finally) {
 
- 		mergePromiseProperty(spawned, promise, 'finally');
 
- 	}
 
- 	return spawned;
 
- };
 
- // Use promises instead of `child_process` events
 
- const getSpawnedPromise = spawned => {
 
- 	return new Promise((resolve, reject) => {
 
- 		spawned.on('exit', (exitCode, signal) => {
 
- 			resolve({exitCode, signal});
 
- 		});
 
- 		spawned.on('error', error => {
 
- 			reject(error);
 
- 		});
 
- 		if (spawned.stdin) {
 
- 			spawned.stdin.on('error', error => {
 
- 				reject(error);
 
- 			});
 
- 		}
 
- 	});
 
- };
 
- module.exports = {
 
- 	mergePromise,
 
- 	getSpawnedPromise
 
- };
 
 
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